Figure 2: Spatiotemporal vertical (a) and horizontal (b) deformation components along the West-East profile (y axis) from June 1995 to December 2012 (x axis) referred to the acquisition in April 1995.
From: Capturing the fingerprint of Etna volcano activity in gravity and satellite radar data

The deformation time series are calculated using ENVISAT (1995–2009) and CSK (2009–2011) images as described in the Methods.